1914. 2018-05-29T18:32:01Z. 2018-09-05T19:37:09Z. Leverett, Frank, 1859-1943. Minnesota Geological Survey. English. cartographic image. Public. Minnesota and Minnesota. Holocene.
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1982. 2006-08-22T15:52:57Z. 2011-03-04T01:08:29Z. Great Britain. Ordnance Survey. British Geological Survey. English&Dutch. Public. Great Britain and North Sea. Quaternary and Holocene.
1983. 2002-06-01T04:00:00Z. 2023-06-17T03:01:27Z. United States. Minerals Management Service. The Survey. English. cartographic image. Public. Alaska. Holocene.
1950. 2012-07-25T14:12:39Z. 2012-07-25T14:43:24Z. Deane, R.E. Canada Dept. of Mines and Technical Surveys, Geological Survey of Canada. English. Public. Ontario and Lake Simcoe Region. Pleistocene and Holocene.
1996. 2002-06-01T04:00:00Z. 2022-07-11T15:16:13Z. Geological Survey (U.S.). The Survey. English. Public. Colorado and Gilpin County. Holocene.